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Babel is a free and open-source JavaScript transcompiler that is mainly used to convert ECMAScript 2015+ (ES6+) code into backwards-compatible JavaScript code that can be run by older JavaScript engines. It allows web developers to take advantage of the newest features of the language. [4]
For example, Tamarin – the virtual machine for ActionScript, developed and open-sourced by Adobe – has just-in-time compilation (JIT) support for certain classes of scripts. In addition to introducing new features, some ES3 bugs were proposed to be fixed in edition 4.
CL-JavaScript: Can compile JavaScript to machine language on Common Lisp implementations that compile to machine language. [11] BESEN: A complete JIT-compiling implementation of ECMAScript Fifth Edition written in Object Pascal. [12] Hermes: developed by Facebook for React Native mobile apps [13] Can also be used independent from React Native.
Previously, JavaScript only supported function scoping using the keyword var, but ECMAScript 2015 added the keywords let and const, allowing JavaScript to support both block scoping and function scoping. JavaScript supports automatic semicolon insertion, meaning that semicolons that normally terminate a statement in C may be omitted in ...
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The other major module specification in use is the ECMAScript (ES) modules specification (ES6 modules aka ES2015 modules). [2] CommonJS can be recognized by the use of the require() function and module.exports , while ES modules use import and export statements for similar (though not identical) functionality.
Vite (French:, like "veet") is a local development server written by Evan You, [2] the creator of Vue.js, and used by default by Vue and for React project templates. It has support for TypeScript and JSX. It uses Rollup and esbuild internally for bundling. [3]
Ember CLI provides an application structure and build pipeline with an add-on. [14] [15] Stability Ember aims to prioritize backward compatibility and allow it to be maintained while still evolving the framework. [16] Future web standards Ember was an adopter of standards around JavaScript and the web, including promises, web components and ES6 ...